The researchers found that the Navigator had the best overall accuracy, with an aggregate mean absolute relative difference (MARD) of all paired points (PG-CGMG measurements) of 11.8 ± 11.1% and an average MARD across all 12 experiments of 11.8 ± 3.8%. The Seven Plus had an aggregate MARD of all paired points of 16.5 ± 17.8% and an average MARD across all 12 experiments of 16.5 ± 6.7%. For the Guardian, the corresponding figures were 20.3 ± 18.0% and 20.2 ± 6.8%. Reliability, as measured by data reporting percentages, was 76% for the Seven Plus and close to 100% for the Navigator and Guardian.

"The results of this head-to-head-to-head comparative effectiveness study reveal the Navigator was the most accurate and precise of the current generation of CGM devices, followed by the Seven Plus and the Guardian," the authors write.